Syringe or applicator



June 6, 1939. H. B. LERMER SYRINGE OR APPLIQATOR Filed Oct. 14, 1936ATTORNEY INVENTCSR Patented June 6,1939

UNITED STATES PATENT OFFICE SYRINGE OR. APPLICATOR tion of New JerseyApplication October 14, 1936, Serial No. 105,508

1 Claim.

This invention relates to improvements in devices for applyingmedicaments to orifices of the body.

Heretofore there have been provided medicament appliactors comprising atube having a piston slidable therein. It has been found that the pistonhas a tendency to stick or freeze in one end of the tube and thusprevents an easy application of the medicament.

It is an object of this invention to. provide a medicament applicatorcomprising aJ'tube having a piston slidably mounted therein, the pistonand other parts of the applicator being .so constructed as to prevent orovercome freezing of the i5 piston and thereby facilitate the applyingof a medicament to orifices.

A further object of the invention is to provide an applicator which canbe readily and releasably connected to a medicament container such as isextensively used for merchandising medicaments and jellies for femininehygiene.

These and other advantageous objects, which will later appear, areaccomplished by the simple and practical construction and arrangementsof parts hereinafter described and exhibited in the accompanyingdrawing, forming part hereof, and in which:

Fig. 1 is an eievational view of a medicament applicator embodying myinvention showing the bulb detached,

Fig. 2 is a sectional view of the applicator shown in Fig. 1 showing thebulb detached,

Fig. 3 is an elevational view of a modified form of the inventionshowing the bulb-detached, and

Fig. 4 is a sectional view of the form shown in Fig. 3 showing the bulbdetached.

Referring to the drawing, in Figs. 1 and 2 there is shown a device forapplying medicaments to body orifices, comprising a tube I. which ispreferably made of a flexible; transparent, nonbreakable material.However, the tube I can be made ofany suitable material, for noting thecontents thereof, if desired. Attached to one end of the tube l is abulbous tip '2 which has a passage 3 therein of less diameter than theinternal diameter of the tube I; and has a shoulder 4 upon which reststhe end of tube I. The passage 3 is internally threaded at 5. Slidablymounted in the tube l is a piston 6 having reduced portions I which areadaptedto enter the passage 3.

The other end of the tube l is provided with a bulbous tip 2 also havingthe structure above described. r

In operation, the tube can be loaded at either end with a medicamentbyscrewing the bulbous tip onto the medicament container, which will forcethe piston to the other end of the tube. In many instances, the pistonhas a tendency to stick upon the shoulder 4 of the tip-and therebyprevent discharge of the medicament when desired. In order to overcomethe sticking or freezing of the piston on the shoulder 4, a connector 8having a threaded portion 9 adapted to engage the thread 5 of the tip,is provided with a conical extension it which engages the reducedportion 1 of the piston 5 and forces the latter 01! of the shoulder 4.The connector 8 is provided with a passage H which communicates with therubber bulb l2 by means of which pressure is applied to the piston todischarge the medicament from the tube.

From the above description it will be seen that I provide an applicatorwhich has each end thereof adapted for connection to a medicamentcontainer or to a connector 8 carrying a bulb.

By means of my arrangement, all tendency of the-piston to stick orfreeze is overcome.

In Figs. 3 and 4 is shown a modified form of the invention in which atube 20 is provided with a bulbous tip 2| having a shoulder 22 receivingone end of the tube 20, said tip having a passage 24 of less diameterthan the internal diameter of the tube 20 and accommodating the reducedportion 25 of a piston 25.

The passage 24 is internally threaded at 21 so that it can be releasablyconnected to a medicament container.

Attached to the other end of the tube 20 is a head 28 having a shoulder29 upon which the end of the tube rests. The head 28 is provided with aconical passage 30 adapted to receive the reduced portion 25 of thepiston 25.

The piston is forced in one direction in the tube by means of pressurederived from a rubber bulb 3| which is attached to a connector 32, thelatter having a conical portion 33 projecting into the conical passage30 of the head 28. The

conical portion 33 -is of such a length that when forced into thepassage 30, it will engage the reduced portion 25 of the piston andforce the pistonoif of the shoulder 29. By means of this structure alltendency of the piston to freeze or stick on the shoulder 29 isovercome.

The foregoing disclosure is to be regarded as descriptive andillustrative only, and not as restrictive or limitative of theinvention, of which obviously an embodiment may be constructed,including many modifications, without departing from the spirit andscope of the invention, set forth in the appended claim.

10 adapted to move into said conical passage when the piston rests uponsaid internal shoulder, and a bulb for moving the piston in the tube,said bulb being attached to a connector having a conical tip adapted tobe received by the conical passage in said member, said conical tipbeing of suflicient length to engage the reduced portion of the pistonand move the piston 011 of the internal shoulder.

HERMAN B. LERMER.

